update version to 1.6
update version to 1.6

colstrom/ansible-haproxy,colstrom/ansible-haproxy,stevenharradine/ansible-haproxy,stevenharradine/ansible-haproxy,telusdigital/ansible-haproxy,aaronpederson/ansible-haproxy,telusdigital/ansible-haproxy,aaronpederson/ansible-haproxy